Pulp-strainer.



No. 669,933. Patented Mar. I2, I90]. J. W.- PACKER.

PULP STRAINER.

(Applicatiop flied Feb. 2, 1899.

A TTOFNEYS.

3 Sheets-8haat l.

NVENTOR (No Model.)

No. 669,933. Pat entad Mar. I2, I91.

J. W. PACKER.

PULP STRAINEB.

(Applicatinn filed Feb. 2, 1899.-

(No Model.) 3 Sheefs-haet 2.

A TTOHNEYS.

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' 'No. 669,933. Patented Mar. l2, I90l.

J. W. PAC-KER. PULP STRAINER.

(Application flled'Feb. 2, 1899.) (No Model.)

3 Sheets-Sheot 3.

//VVENTO/? BY 7 g 4 7'TOHNEY8.

NrrnD STATES PATENT Orrrcn.

JAMES WILLIAM PACKER, OF GLENS FALLS, NEW YORK, ASSIGNOR TO THE SANDY HILL IRON AND BRASS WORKS, OF SANDYHILL, NEW YORK.

PULP-STRAINER.

SPECIFICATION forming part of Letters Patent N 0. 669,933, dated March 12, 1901.

Original application filed December 22 1897, Serial No. 663,084. Divided and this application filed February 2, 1899. Serial No. 704,251. KNomodel.)

T at whom, it may concern.-

Beit known that 1, JAMES WILLIAM PAOKER, of Glens Falls, in the county of Warren and State of New York, have invented a new and Improved PulpStrainer, of which the following is a full, clear, and exact description, this application being a division of the application for Letters Patent of the United States, Serial No. 663,034, filed by me on December 22, 1897.

I0 The invention relates to paper-making machines; and its object is to provide a new and improved pulp-strainer arranged to insure a proper Working of the plunger and without undue strain of the diaphragm.

1 5 The invention consists of novel featu res and parts and combinations of the same, as will be hereinafter more fully described, and pointed out in the claims.

Reference is to be had to the accom panying 2o drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a longitudinal section of the improvement with parts broken out. Fig. 2 is a transverse section of the same. Fig. 8 is an enlarged plan view of the lubricating devices for the cam, the cover of the box being removed. Fig. 4: is a crosssection of the same as applied. Fig. 5 is a rear sectional elevation of the pulp-outlet and collecting-cham ber. Fig. 6 is a cross-section of a modified form of the improvement. Fig. 7is a like view of another modified form. Fig. 8 is an enlarged longitudinal sectional elevation of a modified form of discharge. Fig. 9 is an enlarged side elevation of a modified form of plunger and wear-block, and Fig. 10 is a like view of another modified form of the same.

The main frameA is supported on the usual 0 standards A, connected with each other bya suitable beam A supporting, with the standards, the bearings B for the cam-shaft C, provided at one end with a pulley 0', connected by belt with other machinery for imparting a rotary motion to the said shaft. On the shaft 0 are secured cams D, the lower portions of which extend into waste-receiving boxes E, and the top of each cam is engaged at its periphery by the lower end of a wear-block F,

removably secured to the lower end of a plun- 5o ger G, having its head G secured to a diaphragm H, resting on the top of the frame A and secured thereto by the lower end of a screen-box I, removably secured to the frame A by the usual fastening devices J, so as to hold the ends of the diaphragm H securelyin place on the box, the part of the diaphragm between the frame and the members of the box forming a packing for preventing leakage of the material passing through the box. goo

The soreeu-box I carries the usual screenplates K a suitable distance above the diaphragm H to form a suction-chamber L, into which passes the pulp through the openings in the screens K from the upper portion of the box I, receiving the pulp to be strained from a suitable supply. The screen-plates K are supported on the usual cleats L, attached to the inside of the box I, and also to crossbeams L L carried by the box I, the crossbeams L being above the diaphragm H, and the alternating crossbeams L extending down upon the diaphragm to press this portion thereof against a cross-beam A forming part of the frame A. By this arrangement I am enabled to use a diaphragm H of a single piece and extend it the whole length and width of the frame A and box I. Separate suction-chambers L are formed, one for each plunger G, as will be readily understood by reference to Fig. 1, in which four separate suction-boxes and a corresponding number of plungers are illustrated, it being, however, understood that this number may be increased or diminished, according to the desired capacity of the machine.

The plunger G has its shank G2 bolted to the head G, and on the lower end of the shank is arranged a back plate G3 and a front plate G connected with each other by bolts passing through the shank, as is plainlyindioated in Figs. 1 and 2. The front plate G is formed with a lip G which extends laterally through an opening in the shank G and the back plate G and rests thereon, so that the strain incident to the front plate is transmitted to the other plate to equalize the strain on both plates and the plunger-shank.

Into the opening formed by the lip G in the front plate G and the opening in the plunger-shank G as previously described, extends the inner end N of an arm N, resting with its outer end N on lugs E, formed on a bracket E extending from the wastereceiving box E, as is plainly shown in Fig. 2.

On the top of the arm N presses a spring N the upper end of which rests on a cap N engaged by a nut N screwing on a rod N extending downwardly through an opening in the arm N to connect by a link N with a hook E carried by the bracket E By the operator screwing up or unscrewing the nut N more or less tension can be given to the spring N to press the arm N with more or less force against the plunger G to hold the wear-block F in contact with the peripheral surface of the cam D.

The plunger G is guided in its up-and-down movement by a connection 0, preferably made in the shape of a board sufficiently flexible and secured at its outer end to the bracket E and at its inner end to the front plate G so that the up-and-down movement given to the plunger by the cam D and the springpressed arm N is without sidewise motion, owing to the flexible connection between the plunger G and the bracket E It is understood that by the arrangement described the spring N for insuring the downward movement of the plunger G is entirely separate from the plunger and can be readily adjusted to the desired tension.

The arm N may be dispensed with, as shown in Figs. 6 and 7, and the spring N applied to the guiding connection 0, the spring resting with one end on the cap N carried by a rod N secured to the bracket E The flexible connection 0 is attached at its outer end to the said bracket and at its inner end to the plunger G As illustrated in Fig. 7, the flexible guiding connection 0 is connected with a downwardly extending rod N guided in the bracket E and pressed on by a spring N abutting on the bracket. The connection 0 extends from the bracket E to the plunger G It is understood that the constructions described form spring-actuated pressing devices for the plungers with the springs separate from and independent of the plunger shanks and with the tension of the spring easily regulated by the operator.

The upper straight edge of the wear-block F abuts against the rounded-off under side of the plunger-shank G as is plainly indicated at the left in Fig. 1, so that the lower edge of said wear-block can readily adjust itself according to the peripheral face of the cam to compensate for unevenness in the shape of the wear-block, it beingunderstcod that the upper end can readily roll ofi on the rounded lower end of the plunger-shank G As shown in Fig. 9, the plunger-shankGl is made flat on its lower end to permit the adjustment referred to of the wear-block F which in this case is curved on its upper face; but, if desired, both adjacent edges of the wear-block F and the shank G may be rounded off for the same purpose, as illustrated in Fig. 10.

A clamping-plate F engages the front of the wear-block F to press the latter in contact with the rear plate G suitable bolts being employed for fastening the clamping plate F to the said wear-plate G Bolts F ext-end transversely past the side edges of the wear-block F, so that the latter is kept intact and is not weakened in the least.

In the rear side of the frame (Land-preferably throughout the length of every suctionchambe'r L are found outlet-openings A, registering at their upper ends with corresponding openings H in the diaphragm H, the lower ends of the outleteopenings connecting with an L-shaped outlet P, attached to a receiving-box Q, formed near its bottom with an opening Q, registering with the outlet P.

Each outlet P (shown in Figs. 1 and 2) connects with two suction-chambers L, and for a machine provided with more suction-chambers than shown I may connect three or more such suction-chambers with a single outlet, or, as shown in Fig. 8, two suction-chambers L are connected with an outlet P and a single suction-chamber L to a shorter outlet P both outlets connecting with a receiving-box Q, as previously described. Thus the pulp is gathered from one, two, or more suctionchambers to a common outlet before discharging the pulp into the receiving-box Q.

The receiving-box Q, as shown in Fig. 1, extends throughout the length of the frame A and is formed into two compartments separated from each other by an 0verfiowQ open ing into an outlet-pipe R for carrying off the pulp.

The overflow Q for each compartment can be adjusted, and for this purposel provide gates S, fitted to slide vertically in suitable guideways Q attached to the sides of the box Q.

Each of the gates S is provided with a bail S, adapted to be taken hold of by the operator to raise or lower the gate S, as desired, the bail being engaged by a clamping-screw S for fastening the bail and the gate in place after the desired adjustment is made.

The top of each gate S extends, preferably, a short distance below the plane of the diaphragm H, as shown in Fig. 2, so that a column of material is maintained in the outlet P and opening A of such weight that a return suction of the material from the opening A into the suction-box L does not take place when the diaphragm H is reciprocated, but a suction of the material in the screen K takes place.

Now by the arrangement described the plunger G properly actuates its part of the diaphragm H to insure a proper drawing 01f of the fibers through the openings in the screen K into the suction-box L, the material flowing by its gravity into the receiving-box Q and over the gate S, maintaining at all times a desired column of material in the outlet P and opening A for the purpose previously mentioned.

It will further be seen that the provision of a single outlet P for two or more suctionchambers having a plurality of screen-plates brings the pulp into aseparate compartment in the receiving-box, so that the operator has full control of all the pulp and regardless of the number of suction-chambers in the machine.

In order to properly lubricate each of the cams D, I provide a lubricating device T in the form of a box set at the rear portion of the waste-box E and adapted to contain the lubricant passing up by capillary attraction through a fabric T, such as felt, to the peripheral surface of the cam D, as will be readily understood by reference to Fig. 4. The fabric T is held at its inner end in a suitable support T so as to keep this portion of the fabric submerged in the lubricant, the

other end of the fabric passing through an opening in the side of the box to the outside thereof to be held in contact with the surface of the cam D by a spring-support T carried by the lubricating-box. Thus by the arrangement described the fabric drawing the lubricant up by capillaryattraction is forced in contact with the peripheral surface of the cam D to keep the latter properlylubricated for the wear-block F to travel on.

Although I have fully described the entire machine in all its details, I do not claim in this application all the new features, as some of the features, notably the screen-box, diaphragm, and suction-chambers, form the subject-matter of the original application above referred to.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a pulp-strainer, the combination with a fixed support, a diaphragm, a plunger secured to the diaphragm, and a cam for operating the plunger, of an arm or bar projecting from the support and connected with the plunger, and a spring exerting pressure on said arm or bar, substantially as and for the purpose set forth.

2. In a pulp-strainer, the combination with a fixed support, a diaphragm, a plunger secured to the diaphragm, and a cam for operating the plunger, of an arm or bar carried by the support and having its end loosely engaging the plunger,a rod extending down through the arm or bar and loosely connected with the support, a stop on the end of the rod, and a spring on the rod between the bar and the stop on the end of the rod, substantially as described.

3. In a pulp-strainer, the combination with a plunger, of a flexible guide having one end fixed and its other end secured to the plunger, and a spring pressing device for the plunger, substantially as described.

4. In a pulp-strainer, the combination with a guide and a plunger, of an arm supported at one end, and connected at its other end with the plunger, and a spring pressing the said arm, substantially as shown and described.

5. In a pulp-strainer, the combination with a plunger, and a flexible guide, fixed at one end, and rigidly connected at its other end to the plunger, of an arm supported at one end and having a loose connection with the plunger, and a spring pressing the said arm to exert a downward pressure on the plunger, substantially as shown and described.

6. In a pulp-strainer, the combination with a plunger and a guide, fixed at one end, and rigidly connected at its other end to the plunger, of an arm supported at one end, and having a loose connection with the plunger, a spring pressing the said arm to exert a downward pressure on the plunger, and means, substantially as described, to regulate the tension of the said spring, as set forth.

7. In a pulp-strainer, the combination of a support, an operated plunger, and spring pressing devices for the plunger and including a board secured to the said support and engaging the said plunger.

8. A pulp-strainer provided with aplunger, and awear-block adapted to be clamped to the plunger, and adapted to adjust itself on the plunger end relative to the peripheral surface of the cam with which the said block comes in contact, substantially as shown and described.

9. A pulpstrainer provided with a plunger, and a wear-block adapted to be clamped to the plunger, and adapted to adjust itself on theplunger end relative to the peripheral surface of the cam with which the'said block comes in contact, one or both of the adjacent edges of the said wear-block and plunger being rounded off for the purpose, substantially as shown and described.

10. A pulp-strainer provided with a plunger having a back plate, and a front plate bolted to the plunger, one of the plates having a lip for engaging the other plate and for bringing the strain on both plates, substantially as shown and described.

J AMES WILLIAM PACKER.

Witnesses:

RICHARD O. TEFFT, OSCAR K. Cnoss.

IIO 

